172 Description of Plates 



PLATE II. 



Fig. 5. — A. hroiichialis Audouiu and Edwards {A. grnhil Claparede), from 

 Plymouth. 



Fig. 6. — A. bravcltiaUs, anterior end, dorsal aspect. The first notopodium was 

 wanting, a condition not uncommon in this species. 



Fig. 7. — A. ccaudata Johnston, from Pl^-mouth. 



Fig. 8. — A. ccdiulata, anterior end, dorsal aspect. 



PLATE II L 

 Fig. 9. — A. lovciil Kinberg, from Saldanha Bay, Cape Colony. 



PLATE IV. 



Figs. 10, 11. — Dissections of the anterior portions of A. marina (Linnaeus) 

 (Fig. 10), from Musselburgh, and A. loveni Kinberg (Fig. 11), from 

 Saldanha Bay. The specimens were opened along the mid-dorsal 

 line. Compare their septal pouches and nephridia. Tlie septal 

 pouches of the specimen of A. marina were dilated; they are 

 usually rather smaller than thej' are here represented. 



PLATE V. 



A. cristata Stimpson. 



Fig. 12. — A specimen from Naples, with full number of tail-segments. 

 Neuropodia were absent in the first two chaetiferous segments. 



Fig. 13.— Last chaetiferous segment and tail (consisting of onlj' eight 

 segments) of a specimen, from AVood's Holl, Mass., to show the 

 caudal processes, one of which — on the first tail-segment — is branched 

 and gill-like. 



PLATE VI. 



Fig. 14. — A. glacialis Murdoch. Tj'pe specimen. Note the presence of an 

 eighteenth neuropodium. The buccal mass and pharynx are fully 

 profciuded. The tail is, in the specimen, strongly contracted ; it 

 has been represented in the figure in a condition of more normal 

 extension. 



PLATE VIL 



Fig. 15. — A. pusiUa Quatrefages (.4. claparcdii Levinsen), from Naples. 



Fig. 16. — A. assiinilis Ehlers, from Uschuaia, Beagle Channel. Co-type from 

 Naturhistorisches Museum, Hamburg. 



PLATE VIII. 



Fig. 17. — A. cridata Stimpson, frorn Naples. Dissection of the anterior portion. 

 The specimen was opened along the mid- dorsal line. Note especially 

 the nephridia, the small oesophageal glands, and the septal pouches. 



Fig. 18. — A. jjusilla Quatrefages {A. cJaparedii Levinsen), from Naples. Dis- 

 section of the anterior portion. The specimen was opened along 

 the mid-dorsal line. Note especially the nephridia, the oesophageal 

 glands (five pairs), and the absence of septal pouches. 



